Towards a self tuning sliding mass metastructure

Abstract Passive vibration control systems are characterized by their simple practical design and independence of external power supplies. However, they are usually hindered by their narrow frequency band that cannot handle variable frequency disturbances. Recent research has demonstrated the capabi...

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Autores principales:	Mohammad A. Bukhari, Oumar R. Barry
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/af206b56d5d442aaa9a3eb7db901537b
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spelling	oai:doaj.org-article:af206b56d5d442aaa9a3eb7db901537b2021-11-08T10:50:35ZTowards a self tuning sliding mass metastructure10.1038/s41598-021-00526-w2045-2322https://doaj.org/article/af206b56d5d442aaa9a3eb7db901537b2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-00526-whttps://doaj.org/toc/2045-2322Abstract Passive vibration control systems are characterized by their simple practical design and independence of external power supplies. However, they are usually hindered by their narrow frequency band that cannot handle variable frequency disturbances. Recent research has demonstrated the capability of passive self-tuning resonators through the use of a sliding mass without the need for any external power sources. This work analytically and experimentally investigates the passive self-tuning of a metastructure consisting of a clamped-clamped beam with a sliding mass. The governing equations of motion show that the slider can be driven by Coriolis and centrifugal forces upon applying the excitation force on the structure. To improve the accuracy of our analytical simulations, we derive the exact instantaneous mode shapes and frequencies of the structure and feed them into an adaptive algorithm, which updates the spatial state of the system. Numerical simulations demonstrate that the proposed resonator can tune itself to the excitation frequency as the slider reaches the equilibrium position. This observation suggests that a significant vibration reduction can be obtained using the proposed resonator over a wide frequency band. Experiments are carried out to validate the analytical findings. The proposed structure can be used in different vibration control applications (i.e., aerospace, automotive, and machining), and its model can further be extended to self-adaptive periodic structures (metamaterials).Mohammad A. BukhariOumar R. BarryNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mohammad A. Bukhari Oumar R. Barry Towards a self tuning sliding mass metastructure
description	Abstract Passive vibration control systems are characterized by their simple practical design and independence of external power supplies. However, they are usually hindered by their narrow frequency band that cannot handle variable frequency disturbances. Recent research has demonstrated the capability of passive self-tuning resonators through the use of a sliding mass without the need for any external power sources. This work analytically and experimentally investigates the passive self-tuning of a metastructure consisting of a clamped-clamped beam with a sliding mass. The governing equations of motion show that the slider can be driven by Coriolis and centrifugal forces upon applying the excitation force on the structure. To improve the accuracy of our analytical simulations, we derive the exact instantaneous mode shapes and frequencies of the structure and feed them into an adaptive algorithm, which updates the spatial state of the system. Numerical simulations demonstrate that the proposed resonator can tune itself to the excitation frequency as the slider reaches the equilibrium position. This observation suggests that a significant vibration reduction can be obtained using the proposed resonator over a wide frequency band. Experiments are carried out to validate the analytical findings. The proposed structure can be used in different vibration control applications (i.e., aerospace, automotive, and machining), and its model can further be extended to self-adaptive periodic structures (metamaterials).
format	article
author	Mohammad A. Bukhari Oumar R. Barry
author_facet	Mohammad A. Bukhari Oumar R. Barry
author_sort	Mohammad A. Bukhari
title	Towards a self tuning sliding mass metastructure
title_short	Towards a self tuning sliding mass metastructure
title_full	Towards a self tuning sliding mass metastructure
title_fullStr	Towards a self tuning sliding mass metastructure
title_full_unstemmed	Towards a self tuning sliding mass metastructure
title_sort	towards a self tuning sliding mass metastructure
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/af206b56d5d442aaa9a3eb7db901537b
work_keys_str_mv	AT mohammadabukhari towardsaselftuningslidingmassmetastructure AT oumarrbarry towardsaselftuningslidingmassmetastructure
_version_	1718442652578349056

Towards a self tuning sliding mass metastructure

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